Bump swagger-core version

Author: ooz

restdocs-api-spec-openapi3-generator/build.gradle.kts

@@ -16,7 +16,7 @@ dependencies {
     compile(project(":restdocs-api-spec-model"))
     compile(project(":restdocs-api-spec-jsonschema"))
 
-    compile("io.swagger.core.v3:swagger-core:2.0.8")
+    compile("io.swagger.core.v3:swagger-core:2.1.3")
     compile("com.fasterxml.jackson.core:jackson-databind:$jacksonVersion")
     compile("com.fasterxml.jackson.module:jackson-module-kotlin:$jacksonVersion")